Improved Absolute Frequency Measurement of the 171Yb Optical Lattice Clock towards a Candidate for the Redefinition of the Second
Improved Absolute Frequency Measurement of the 171Yb Optical Lattice Clock towards a Candidate for the Redefinition of the Second
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DOI：
10.1143/apex.5.102401
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发表时间：
2012-09
影响因子：
2.3
通讯作者：
M. Yasuda;H. Inaba;T. Kohno;T. Tanabe;Y. Nakajima;K. Hosaka;D. Akamatsu;A. Onae;T. Suzuyama;M. Amemiya;F. Hong
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文献类型：
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作者：
M. Yasuda;H. Inaba;T. Kohno;T. Tanabe;Y. Nakajima;K. Hosaka;D. Akamatsu;A. Onae;T. Suzuyama;M. Amemiya;F. Hong
我们提出了一种改进的测量一维光学晶格中171Yb原子在578 nm处1S0-3P0时钟跃迁的绝对频率。通过腔内电光调制器的光学频率梳，将激光器锁定在1064 nm的超稳定掺钕铝石榴石激光器上，使时钟激光线宽减小到≈2 Hz，从而获得高的伺服带宽。绝对频率被确定为相对于国际单位秒的518295836590 863.1(2.0)赫兹，并将向国际度量衡委员会报告。
We demonstrate an improved absolute frequency measurement of the 1S0–3P0 clock transition at 578 nm in 171Yb atoms in a one-dimensional optical lattice. The clock laser linewidth is reduced to ≈2 Hz by phase-locking the laser to an ultrastable neodymium-doped yttrium aluminum garnet (Nd:YAG) laser at 1064 nm through an optical frequency comb with an intracavity electrooptic modulator to achieve a high servo bandwidth. The absolute frequency is determined as 518 295 836 590 863.1(2.0) Hz relative to the SI second, and will be reported to the International Committee for Weights and Measures.